Effects and mechanism on Kapton film under ozone exposure in a ground near space simulator
| Autor: | Zhang Tingting, Gang Liu, Haifu Jiang, Yang Guimin, Wei Qiang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Ozone General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Corrosion Kapton chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Sputtering 0103 physical sciences Surface roughness Diffuse reflection Composite material 0210 nano-technology Polyimide |
| Zdroj: | Applied Surface Science. 440:1083-1090 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2018.01.231 |
| Popis: | The effect on aircraft materials in the near space environment is a key part of air-and-space integration research. Ozone and aerodynamic fluids are important organizational factors in the near space environment and both have significant influences on the performance of aircraft materials. In the present paper a simulated ozone environment was used to test polyimide material that was rotated at the approximate velocity of 150–250 m/s to form an aerodynamic fluid field. The goal was to evaluate the performance evolution of materials under a comprehensive environment of ozone molecular corrosion and aerodynamic fluids. The research results show that corrosion and sputtering by ozone molecules results in Kapton films exhibiting a rugged “carpet-like” morphology exhibits an increase in surface roughness. The morphology after ozone exposure led to higher surface roughness and an increase in surface optical diffuse reflection, which is expressed by the lower optical transmittance and the gradual transition from light orange to brown. The mass loss test, XPS, and FTIR analysis show that the molecular chains on the surface of the Kapton film are destroyed resulting in C C bond breaking to form small volatile molecules such as CO2 or CO, which are responsible for a linear increase in mass loss per unit area. The C N and C O structures exhibit weakening tendency under ozone exposure. The present paper explores the evaluation method for Kapton’s adaptability under the ozone exposure test in the near space environment, and elucidates the corrosion mechanism and damage mode of the polyimide material under the combined action of ozone corrosion and the aerodynamic fluid. This work provides a methodology for studying materials in the near-space environment. |
| Databáze: | OpenAIRE |
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